hinbichs



- (No Model.)

G. REISTLE & C. F. A. HINRIGHS.

STUDENT LAMP.

} Patented Sept. 27,1881.

N. PETERS Phaio-Lilhagrapher. Washingh'm. n, c.

* UNITED STATES PATENT OFFICE.

CHARLES REISTLE AND CHARLES F. A. HINRIOHS, OF BROOKLYN, NEW YORK, ASSIGNORS TO SAID HINRIOHS.

STUDENT-LAMP.

SPECIFICATION forming part of Letters Patent No. 247,580, dated September 27, 1881.

Application filed May 24, 1880. (N0 model.)

To all whom it may concern:

Be it known that we, OHARLEs REISTLE and CHARLES F, A. HINRIOHS, of Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Student-Lamps, of which the following is a correct description.

Our improvement relates to the construction of the chimney-holder so thatit is very strong and light, and may be removed with the chimney from the burner; to the manner of connecting the oil-tube to the reservoir and to the tubular slide for the vertical standard; to the reservoir-case, adapted to the reception of a glass exterior case, and to the vitrified coverin g-cylinder for the oil-reservoir.

In the drawings, Figure l is a vertical section ofthelamp complete. Fig.2 is a detached view of the chimney-holder sectionally. Fig. 3 is a section through the oil-tube and tubular slide for the standard, and Fig. 4 is a plan view of the eye of the shade-holder.

The reservoir is formed of a cylinder, to, around the outside of which there is an ornamental glass cylinder, b, as shown in Patent No. 214,134; but instead of the glass extending to the bottom of the cylindrical reservoir and having a hole bored or a notch formed for passing by the oil-tube c, the lower part of the reservoir-a has a base or offset, 11, that is as high as the top of the tube 0, in order that the glass may have a straight lower end and not be liable to injury near the tube 0. This base d strengthens the connection between the reservoir a and the tube 0, because said tube 0 passes through both the base d and reservoir a, and we extend the said tube 0 across to near the rear or opposite side of the reservoir, and there make an opening into said tube. This construction lessens the quantity of oil that remains in the bottom of the reservoir, and also prevents the oil all running into the burner-tube when the lamp may be tipped toward the burner, because said oil. will remain to a considerable extent in the reservoir instead of overflowing the lamp-burner.

There is a pin, 3, at one side of the fountain f, and near the top thereof, and in the upper edge of the reservoir there is a vertical slot. Otherwise the fountain is made, as usual, with the valve g and filling-neck h. The object of this pin and slot is not to hold the fountain into the reservoir, as has heretofore been done by a bayonet-lock, but it is to sustain the fountain by the pin resting upon the top edge of the reservoir when the lamp is not in use, so that the valve-stem is clear of the bottom of the reservoir and the valve closed, to prevent the escape of oil. When the lamp is to be used the fountain is turned until the pin passes into the slot, and the fountain descends and the valve is opened.

The tube 0, instead of being round, as usual, is made square or oblong in section. The object of this is to obtain the necessary size of tube, and at the same time allow the base (1 to be narrower than it could be if a round tube of the same sectional area were used, and to allow the flat upper side of the tube to be soldered to the bottom piece, a, of the reservoir a and, furthermore, by making this tube 0 flat instead of round, we are enabled to dispense with a ball, that is usually employed where the tubular slide for the standard Z is connected to such tube 0. By using this flat tube 0 we are enabled to pass the tubular slide is through the said tube a transversely and to secure the same by solder. This leaves the necessary space at each side of the slide-tube k for the passage of oil within the tube 0,- and makes a very strong and durable connection.

For chandeliers we prefer to make the entire tube 0 oblong or square in section; but for hand-lamps the appearance is generally the most acceptable when the portion of the tube 0 that curves downwardly and passes to the lam p-burner is round, or nearly so. When this flat tube 0 is used with a double lamp it is preferable to pass the same entirely across beneath the bottom of the reservoir from one burner to the other, and to have a central opening into such tube from the bottom of the reservoir.

The burner-tube m is made with a screw at the lower end forthe drip-cup n, and the lower end of the tube on and air-tube 0 are firmly connected, so as to leave the annular oil-space, as usual.

The wick-raiser r is revolved around the screw upon the air-tube by the vertically-slotted cylinder 8.

In Letters Patent No. 186,732 the chimney holder or gallery is provided with a guide around the outside of the burner-tube. We are enabled to make use of a guide of this character and at the same time remove the chimney-holder and chimney together from the burner, thus facilitating lighting.

The tube t surrounds the outside of the burner-tube m, and it has at its upper end an in ward and downward projecting sleeve, that reaches to the slotted wick-raising tube 8, and there are notches in the one and lugs on the other, as usual, so that the slotted wick-raising tube can be revolved by means of the tube 25 and its flanged base 25.

The cone u is made with a flange or base at its lower end, and the spring chimney-holder 'v surrounds the same, and the metal is pressed together, so as to grasp the lower edge of the base of the cone and connect the two parts firmly together; or the parts may be soldered or otherwise attached. The chimney has the usual base and contracted neck, and the lower end of the chimney is within the spring chimney-holder and rests upon the base of the cone it. There are vertical openings in the cone n, which openings are largest at the bottom, and the air that is supplied to the outside of the flame passes through these openings, and is deflected upon the flame by the contraction of the chimney. The cone and chimney-holder rest upon the flange or base i, and can be easily removed therefrom or replaced for Ii ghtin g or trimming.

It is to be understood that the flange or base thas openings in it that admit air freely Within the cone.

Heretofore in cases where the dri p-cu p is allowed to fill with oil, either from carelessness or accident, the air is excluded from the central air-pipe by the oil rising into the air-holes in the drip-cup. The lamp smokes and sometimes catches fire in the drip-cup and is injured. To prevent this contingency we make one or more small holes at 7, near the top part of the drip-cup, so that the oil will run away, and by dropping attract attention, and the oil cannot rise and stop the air-holes in the upper part of the drip-cup.

Vith Argand burners thathave a large airtube the light sometimes flickers, andis unsteady, in consequence of the air rising unequally. VVe obviate this by the vertical tube to, that is central to the air-tube and passes through the drip-cup, and is open at both top and bottom. This tube not only steadies the ascending current of air, but it also allows a jet of air to pass up to the center of the flame, and by raising and lowering the drip-cup by the screw that connects it with the burner the action of the central tube on the flame will be varied, so as to prevent smoking or flickering.

In some instances the metallic case of the reservoir may not extend up above the top of the base (I, in which case the vitrified cylinder will surround the oilfountain and be removable with the same. The metallic base and vitrified cylinder will in this form have the same relation to each other, as before set forth.

In Letters Patent No. 110,464; the shadeholder is supported upon the tubular slide for the standard, and the pointed end of the clampscrew passes into a groove. This is liable to be injured by the screw-point. We solder a key, 5, to the outside of this tube, and form a slotted key-seat in the eye of the shade-holder, as seen in Fig. 4:. The parts are held, when adjusted, by the clamp-screw 6.

In the ordinary studcnt-lamp the gallery or base and spring chimney-holder are connected to a tube or skeleton-tube that extends up to the top of the burner-tube and interlocks with the wick-raising tube, and the cone is within the chimney-holder. These parts can be lifted off; but they are almost always oily, and cannot be replaced when the lamp is burning without extinguishing the flame. By our improvement the cone and chimney-springs are connected together, but they are separate from the base i and its supporting-tube t, so that the latter remain in place; but the chimney holder, cone, and chimney can be removed or replaced without extinguishing the li ht.

VVc do not herein lay any claim to the valve of the reservoir or the tubular guide for the same, that being reserved for another application for a patent by us.

We claim as our invention 1. In an Argand burner, the perforated cone u and spring chimney-holder connected together and removable with the chimney from the other parts of the lamp, in combination with the wick-raising screw, the wick-raiser s, the external tube, 1, and its openqvork base 13, upon which the cone and chimney-holder rest, but which extends outside of the same, so as to be operated in raising and lowering the wick, substantially as set forth.

2. The combination, in a student-lamp, of the burner, a reservoir, and a flat or square tube passing from the reservoir to the burner, and a vertical tube for the slide of the standard passing transversely through the flattened tube and soldered, substantially as set forth.

3. In combination with the metal reservoir or oil-fount and the vitrified cover or case for the same, a projecting base surrounding the reservoir, and extending up as high as the top of the oil-tube c, for the purposes and as set forth.

4t. Incombination with the oil-reservoir, the flattened tube a, passing in at one side thereof, and extending across to near the other side and beneath the bottom piece of the reservoir, substantially as set forth.

5. In combination with the reservoir in a student-lamp, the flat tube 0, passing across the bottom of the reservoir, substantially as and for the purposes set forth.

Signed by us this 19th day of May, A. D. 1880.

GHS. G. F.

REISTLE. A. HINRIOHS. \Vitnesscs GEO. T. PINCKNEY,

WILLIAM G. Mortr. 

